Typewriting machine



Nov. 3, 1925.

G. A. SEIB TYPEWRITING MACHINE Filed Nov. 28. 1923 5% H E: AT'T URNE! WlTNESS .5-

Patented Nov. 3, 1925.

UNITED STA TES.

PATENT- QFFICE'.

GEORGE A. SEIB, OF ILION, NEW YORK, AS SIG-NOR T O REMINGTON 'DYPEWRITER COM- PANY, 0F ILIONQNEWYYORK, A CORPORATION on NEW. YORK. I

'rvrnwarrme MACHINE.

Application filed November 23,1923. Serial no." 677,361.

Ilion,'i11 the county of Herkimer and State 1 of New York, have invented certain new and useful Improvements in Typewriting Mtts'l chines, of which the following is a specification.

I chines and more particularly to type act-ions therefor. The main object of my invention, generally stated, is to provide a light operating and highly efficient type action.

hereinafter appear, my invention consists in the features of construction, combinations of devices and arrangements of parts'her'einafter described and particularly pointed out in the appended claims.

Figure 1 of the drawing is a fragmentary fore-and-aft vertical sectional view of a typewriting machine embodying my invention. I

Figure 2is an enlarged detail fragmentary sectional view showing a slightly modified form of construction. 7 f

I have shown my invention embodiedin a standard Remington machine, only so much 1 of said machine being shown asis necessary to arrive at an understanding of the invention. It should be understood, however, that the invention may be embodied in other styles of typewriting machines and that various changesmay be made to, facilitate such embodiment.

The frame of the maclnne comprises a base 1, corner posts 2 and a top plateS.

The usual carriage (not shown) carries a platen a and is controlled in its letter feedmovement by escapement mechanism controlled through lntermediate' connections 5,

6 and 7 from a universal bar 8. The uninected at one end to an adjustable bracket.

arm 10 and at its opposite end 11 to the crank arm 6.

Each actuation of a printing key' not only controls the escape'ment mechanism but also the usual ribbon vibrator mechanism which includes a separate universal bar 12, rock shaft 13, crank arm 14 and lever-like pivoted frame 15 operatively connected with l: the ribbon vibrator.

My invention relates to typewritingzmm To the above and other ends whichwill this figure.

f Printing key levers 16 are constructed and mounted in the usual mannenan'd actuate type bars 17 each lever being providedvwith afinger key 18 and a returning spring 19. Each key lever has an upwardly extending member 20 that carries a laterally projecting pin 21 received in a slot 22 in can angular sub-lever 23. The levers 23 are mounted in the usual manner 'on a pivot wire 24 Supported on a slotted fixed cross bar 25; The typefbars 17 are segmentally arranged and mounted on a pivot wire 26 in a slotted type bar segment 27 to strike'upwardly and rearwardly against the front face of the platen 4. The heel of each type bar is formed with a contact memberf28 adaptedto coact with the front. edge .ofjthe segmental universal bar 8 and move the latter rearwardly against the'force of the spring 9, and thus control the carriage'escapement. So far as described the'parts are of the usual construction embodied in standard Remington machines As shown in thecpresent instance, how ever, the upper end portion of each angular sublever is slotted longitudinally at ,29to receive with a. close" sli'ding' fit a headed pin SOthat projects laterally from the heel of the associated type bar 17 and forms an interlockingconnection therewith. The con struction and relative arrangement" of the parts of each type actionare such that on' the "depression of. a finger key 18 from the normal dOt-and-dash to the full line-position shown in Fig. 1, the following operation of V the parts takes place: In the, normal position of the parts the longitudinal slot 29 in each sublever 23 extends transversely of the direction of the motion of the associated pin 30. Therefore, the movement of each sublever from normal position willfcause 'a movement ofthe associated type bar to. wards-the printing position, the key lever, sublever and type bar moving siinultaneous ly. This key controlled operating move ment of the type bar *will continue until the parts reach the full line position shown in It will be seen that at this time relative arrangement of the parts has been changed so'that the slot 29. extendslongi;

tudinally in the general T direction of the" travel of the pin 30 from this point to the dotted line printing position of the type bar. It also'will be seen that when the parts are in the full line position shown in Fig. 1 the sublever under key depression ceases to exert an operating force on the type bar, working as it does at this time with a dead center pull against the pivot 26 of the type bar, as indicated by the line a, in Figs. 1 and 2. This, therefore, limits the depression of the key lever and the operating movement of the sublever beyond the positions shown in full lines in Fig. 1. Notwithstanding this arrest of the key lever and sublever a further movement of the type bar to the'dotted line printing position is effected. This is 'due to the overthrow of the type bar by the momentum ithas acquired from the depression of the finger key ;-such overthrow movement of the bar being permitted by the movement of the pin along the slot 29, acting at this time substantially as a lost motion connection. It will be seen that this overthrow movement of the type bar after the operating movement of the finger key and the intermediate actuating connections or devices have been arrested, is brought about after the type bar has been moved by saidkey and connections close to the printing position, and the type bar has acquired a high speed. The overthrow movement of the type barf'rom the full to the dotted line printing position in Fig. 1 is therefore effected entirely by its own momentum and without restraint from the finger key and subleve'r except for a slight camming action of the pin 30 against'a wall of the slot 29 "at the last part of the move ment of the type bar. This tends to pull the subleve'rbac'k and elevate the key lever and in practice aidsingiving a quick return to thetype bar,as well as to reduce the striking force ofthje type against the paper;

Should the finger key be depressed very slowly it would result in moving the type bar only "to full line position in Fig. 1, but in the ordinary operation of the key the type bar overthrows beyond this position to the printing point.

In practice I preferto'dispense with the usual anvil on the type bar segment and against which it is customary to have each type bar strike justprior to making an imprint. This anvil may be readily dispensed with in the present construction since it is impossible to hold a type bar against the platen by pressure exerted on the finger key, and it is therefore impossible to cause blurred imprints or ghosts by holding the type bar against the platen when it is in motion. I

The manner of arresting the depression of the key by movement of the actuating parts to the full line position in Fig. 1-, and

through the actuating parts themselves, provides an easy acting cushioning arrest agreeable to the operator.

The overthrow'movement of the type bar from the full to the dotted line position in Fig, 1 is made against the'force of the spring 9 by which the universal bar is returned, and the reaction of this spring and the rebound of the type bar from the platen is effective to quickly return the type bar from. the dotted to, or slightly beyond, the full line position even should the operator maintain the finger key 18 depressed.

Should it be found desirable to obtain a greater extent of retardation of the type bar as it overthrows beyond the line a, then the slot 29 may be slightly modified as indicated in Fig. 2. From a consideration of this figure it will be understood that the side walls of that portion 29 of the slot 29 in each sub-lever. at and upwardly beyond where the associated pin 30 rests when .in the full line Fig. 1 position may be slightly curved away from the type barpivot 26 as the partsappear inthe-full line position. This is clearly indicated in Fig. .2 from which itwill be seen that upwardlybeyond the position indicated by the dotted line a the walls of the slot 29 are curved at 29 on arcs represented by the dotted lines b. 'When the Fig. 2 position is reached the slightly curved rear wall 29 acts as a cam tending to more materially resist the movement of the bar from the full to the dotted line position in Fig. 1. During this overthrow motion of the type bar, the sub-lever is pulled back and the key lever elevated slightly. In practice, however, I prefer to have the side walls of the slot 29 in each sublever made straight throughout as in Fig. 1.

In view of the fact that the type ba r moves to the printing position'and immediately returns therefrom to the full line position even though the operatormaintain's the printing key depressed, an escapement with any desired extent of drop for the carriage up to a full drop or reverse feed, maybe provided without the possibility of holding the type bar against the platen while it is in motion, which would result in producing blurred imprints or ghosts. The construction therefore accommodates itself not only to different characters of escapements but also to the touch of the operator, whether it be along following stroke or a short quick stroke.

It will 'be understood, moreover, that the universal bar 12 [for the ribbon vibrator necessarily completes its stroke and moves the ribbon in the path of the approaching type bar, by the time'the latter moves to the full line position in Fig. 1. Therefore, the ribbon may beheld against movement-in its actuated position while the-type bar is moving from the full to the dotted line position in Fig. 1, thus insuring a proper positioning of the ribbon.

Inasmuch as a type bar cannot be held under key depression in the type bar center guide 31,.b'ut movesquickly into and-out of said guide from the full to the dotted line position in Fig. 1 and vice versa, there is less liability of a type bar sticking in" the I notonly dispense with the noise ordinarily incident to the type bars striking such anvil, but also reduce the cost-of manufacture and the additional aligning costs incidental to the use of an anvil. i

' The present 'COIlStILlCtlOIl is such that it lends itself to ready embodiment in stand ard Remington machines with but little change except the modification of sublevers and type bars as shown herein, andthe removal of theanvil when desired. i

While I have described my invention with considerable detail in the particular embodiments thereof shown in the present instance, it should be understood that various changes may be made without departing from the invention as it is defined. in .the accompanying claims. I C

. What I claim as new and desire to secure by Letters Patent, is v 1. In a type action for typewriting machines, thecombination of a type bar that turns always on a single fixed pivot, a finger key, and intermediate actuating connections which include a close sliding fit pin and slot connection betwen the type bar and one of its actuating members which limits the depression of the key before the type bar reaches the printing position.

2. In a type action for typewriting machines,'the combination of a type bar that always turns on a single fixed pivot, a finger key, and constantly maintained intermediate actuating connections which include a pin and slot connection between the type bar and one of its actuating members which limits the depression of the key before the type bar reaches the printing position and enables the type bar by its momentum to travel the remainder of the distance to the printing position.

8. In a type action for typewriting machines, the combination of a type bar, a key lever, and intermediate actuating connections between said key lever and type bar which include a pin-and-slot connection that varies its relation so as to substantially dead center the parts at said pin-and-slot connection and thus enable the type bar to travel independently to the printing point by its own momentum after the depression of the key has been arrested.

4. In a type action for typewritingmachines, the combination of a type bar, a key actuated lever therefor, and a pin and slot connection between the type bar and lever that limits thetactuation of? thelever but permits the type bar-to travel :to' the printing pointiby its momentum .I-aften'the leverfhas been arrested in itso eratin'g movement. 7

=5. Ina .type action fortypewriting.machines, the combinationo-f .ai pivoted type baricarryinga pin, and a key actuated lever having .a slot in which said pin 'works, th e construction and relation ofthe partsibeing such that the lever operates with a dead center pull againstthe pivotof the type bar: and has its operating movement thus limited whilerthe type bar completes its movement to the printing pointbyfits own momentum after said key actuated lever has been ar-J rested in its operating movement.

T6. In aztype action for typewriting maf chines, the combination ola type bar,;a key, and intermediate actuating CO11DeCt1pDS 'b8 tween the key'and type'bar including a pin and slot coimectiomthe parts being con-* structed and arranged so that the walls of the slot extend transversely of the'direction of travel of the pin at the first portion of the stroke of the key and extend longitudi nally in the general direction oftravel of the pin later in the strokesofthat the; type bar may overthrow and complete its -travel" to the printing point byits own -momentum.

.7 In a type action for type'wr-itingmachines, the combination of a pivoted type bar, a key lever, an intermediate sublever having a slot therein, and a pin on the type bar which works in the slot in the sublever, the construction and arrangement of the parts being such that the walls of said slot extend transversely ofthe direction of travel of said pin during the first portion of the key depression and the sublever pulls against the pivot ofthe type vbar before the latter has completed its printing movement thereby limiting the depression of the key lever and at which time the walls of said slot are disposed in the general direction of the travel of the pin to permit an overthrow movement of the type bar under its own momentum.

8. In a type action for typewritingjmachines, the combination of a pivoted type bar provided with a pin at its heel and a key actuated sublever arrested by the pivot of the type bar and formed with a slot to embrace said pin and drive said type bar positively a limited distanceysaid slot being prolonged to permit said type bar to travel alone the remainder of its required distance. by overthrow.

, 9. In a typewriting machine, the comb-ination of an upwardly and rearwardly striking type. bar, a spring returned'universal bar which is actuated by said type bar, a finger key, and intermediate actuating co-nnecti-ons between said type bar and finger keyincluding a pin and slot connection that operates'positively 0n the key depression to sition and at the last portion of the movement of the bar acts substantially as a lost motion connection to enable the type bar to 7 complete its movement to printing position by its own momentum.

10. In a typewrit-ing machine, the combination of a type bar, a key lever, i-nterme' diate actuating connections between the type bar and key lever including a sub-lever and a pin and slot connection between the type bar and Sub-lever by which the key lever is limited in its depression before the type bar reaches the printing Eposition, the type bar thereafter completing its stroke by overthrow due to its own momentum, and a imiversal bar for a. ribbonvibrator actuated directly by the key lever and completing its movement before the said overthrow movement of the type bar takes place.

11. In a typewrit-ing machine, the combination of a typebar, a-spring returned universal bar for a carriage esca pement, a finger key, intermediate actuating connections between said type bar-and finger key includ ing a pin and slot connection "by which the finger key is limited in its depression before the type bar reaches the printing position, the type bar thereafter completing its stroke by an overthrow movement due to its own momentum, and 'a second universal bar for ing a slot embracing said pin; the sublever being arranged to be arrested by the type bar pivot before the type bar arrives atrthe printing position and the said slo-t being long enough to enable thetype bar thereafter to complete its printing motion by momentum.

13. In a typewriting machine, the combination of a pivotedtype :bar .having a pin at its heel and a key actuated sublever having a slot embracing said pin; the :sublever being arranged to be arrested by the type bar pivot before the type bar 'arrives at the printing position, the said slot being long enough to enable the type bar thereafter to complete its printing motion by momentum and the end of said slot being so related to said pin during the overthrow movement of the type bar as that the pin has a reverse camm'ing action on said sublever.

Signed at Ilion, in the county of Herkimer, and State of New York this 23 day of No vember, A. D. 1923.

(meson A. SE-IB. 

